V0.55 didn’t fix this unfortunately: my steps to reproduce still produce the unstylized text and not a code block.

tracking: stable
installed: 0.55 (87) 125MB –
refreshed: 2017-11-19 19:51:40 +0200 EET

Perak’s markdown ironically has had one issue reported about a reverse problem: someone had their first line always treated as code block (which was because they had indented the line). No bugs reported about the first line indentation being trimmed off.